# List
skills = ["js", "python", "vue2", "angular", "react"]

# in 🏀
print("js" in skills)  # True
print("vue3" in skills)  # False
print("vue3" not in skills)  # True

while True:
    skill = input("Your expect skill: ")
    if skill in skills:
        print("You can start it")
    else:
        skills.append(skill)
        print("Not have this skill,add it")
        break

# count 🏀

# index 🏀
